Difference between revisions of "How to use GPIO RK3588"

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Line 11: Line 11:
  
 
E.g. GPIO3_A0 becomes 96
 
E.g. GPIO3_A0 becomes 96
 +
  
 
== ROM-6881 ==
 
== ROM-6881 ==
 +
 +
'''V130:'''
  
 
{| border="1" cellpadding="1" cellspacing="1"
 
{| border="1" cellpadding="1" cellspacing="1"
Line 55: Line 58:
 
| Ext-GPIO0 P07
 
| Ext-GPIO0 P07
 
| 492
 
| 492
 +
|-
 +
| GPIO9
 +
| GPIO4_A0
 +
| 128
 +
|-
 +
| GPIO10
 +
| GPIO3_C0
 +
| 112
 +
|-
 +
| GPIO11
 +
| GPIO3_C1
 +
| 113
 +
|}
 +
 +
'''V106:'''
 +
 +
{| border="1" cellpadding="1" cellspacing="1"
 +
|-
 +
| GPIO Number
 +
| GPIO formed
 +
| Numeric Representation
 +
|-
 +
| GPIO0
 +
| Ext-GPIO0 P00
 +
| 493
 +
|-
 +
| GPIO1
 +
| Ext-GPIO0 P01
 +
| 494
 +
|-
 +
| GPIO2
 +
| Ext-GPIO0 P02
 +
| 495
 +
|-
 +
| GPIO3
 +
| Ext-GPIO0 P03
 +
| 496
 +
|-
 +
| GPIO4
 +
| Ext-GPIO0 P04
 +
| 497
 +
|-
 +
| GPIO5
 +
| GPIO4_B5
 +
| 141
 +
|-
 +
| GPIO6
 +
| Ext-GPIO0 P05
 +
| 498
 +
|-
 +
| GPIO7
 +
| Ext-GPIO0 P06
 +
| 499
 +
|-
 +
| GPIO8
 +
| Ext-GPIO0 P07
 +
| 500
 
|-
 
|-
 
| GPIO9
 
| GPIO9

Revision as of 10:42, 28 March 2024

Configuration

The RK3588 bank/bit notation for GPIOs must be formed as "GPIO<GPIO_bank>_<gpio_bit>" 

The numeric value of GPIO is calculated as follows: 

32 x (gpio_bank) + gpio_bit

gpio_bit : A0～A7 0-7 B0～B7 8-15 C0～C7 16-23 D0～D7 24-31

E.g. GPIO3_A0 becomes 96


ROM-6881

V130:

GPIO Number GPIO formed Numeric Representation
GPIO0 Ext-GPIO0 P00 485
GPIO1 Ext-GPIO0 P01 486
GPIO2 Ext-GPIO0 P02 487
GPIO3 Ext-GPIO0 P03 488
GPIO4 Ext-GPIO0 P04 489
GPIO5 GPIO4_B5 141
GPIO6 Ext-GPIO0 P05 490
GPIO7 Ext-GPIO0 P06 491
GPIO8 Ext-GPIO0 P07 492
GPIO9 GPIO4_A0 128
GPIO10 GPIO3_C0 112
GPIO11 GPIO3_C1 113

V106:

GPIO Number GPIO formed Numeric Representation
GPIO0 Ext-GPIO0 P00 493
GPIO1 Ext-GPIO0 P01 494
GPIO2 Ext-GPIO0 P02 495
GPIO3 Ext-GPIO0 P03 496
GPIO4 Ext-GPIO0 P04 497
GPIO5 GPIO4_B5 141
GPIO6 Ext-GPIO0 P05 498
GPIO7 Ext-GPIO0 P06 499
GPIO8 Ext-GPIO0 P07 500
GPIO9 GPIO4_A0 128
GPIO10 GPIO3_C0 112
GPIO11 GPIO3_C1 113

Test

Here we take GPIO0 of ROM-6881 as an example.

Export GPIO then you can use control GPIO from userr space through sysfs

Export GPIO0 

# echo 493 > /sys/class/gpio/export

Set GPIO direction to in/out 

# echo "out" > /sys/class/gpio/gpio493/direction

Set GPIO value 0/1 if GPIO pin define is output 

#  echo 1 > /sys/class/gpio/gpio493/value

Used as IRQ signal

Note:You have to configure GPIO to input 

#  echo "rising" > /sys/class/gpio/gpio493/edge
  • rising: Trigger on rising edge
  • falling: Trigger on falling edge
  • both: Trigger on both edges
  • none: Disable interrupt on both edges

Unexport GPIO0 

# echo 493 > /sys/class/gpio/unexport

Test

GPIO0 and GPIO1 are taken as an example:

  • Connect GPIO0 and GPIO1
  • Export GPIO0 and GPIO1 
# echo 493 > /sys/class/gpio/export
# echo 494 > /sys/class/gpio/export
  • Set GPIO0 to output 
# echo "out" > /sys/class/gpio/gpio493/direction
  • Set GPIO2 to input 
# echo "in" > /sys/class/gpio/gpio494/direction
  • Change GPIO0 to 1 and read GPIO1 value 
# echo 1 > /sys/class/gpio/gpio493/value
# cat /sys/class/gpio/gpio494/value 
1
  • Change GPIO0 to 0 and read GPIO1 value 
# echo 0 > /sys/class/gpio/gpio493/value
# cat /sys/class/gpio/gpio494/value 
0
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